Methods and algorithms for computer synthesis of holographic elements to obtain a complex impulse response of optical information processing systems based on modern spatial light modulators

Zlokazov, E. Yu.

doi:10.1070/qel17291

Cited by 12 publications

(7 citation statements)

References 50 publications

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“…This type of hologram is commonly synthesized by iterative methods such as the Gerchberg–Saxton algorithm [ 21 ]. Phase holograms are reconstructed using phase liquid crystal spatial light modulators [ 22 ]. Since these holograms are phase modulated, they cannot be directly displayed onto fast amplitude DMDs.…”

Section: Introductionmentioning

confidence: 99%

What Binarization Method Is the Best for Amplitude Inline Fresnel Holograms Synthesized for Divergent Beams Using the Direct Search with Random Trajectory Technique?

et al. 2023

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Fast reconstruction of holographic and diffractive optical elements (DOE) can be implemented by binary digital micromirror devices (DMD). Since micromirrors of the DMD have two positions, the synthesized DOEs must be binary. This work studies the possibility of improving the method of synthesis of amplitude binary inline Fresnel holograms in divergent beams. The method consists of the modified Gerchberg–Saxton algorithm, Otsu binarization and direct search with random trajectory technique. To achieve a better quality of reconstruction, various binarization methods were compared. We performed numerical and optical experiments using the DMD. Holograms of halftone image with size up to 1024 × 1024 pixels were synthesized. It was determined that local and several global threshold methods provide the best quality. Compared to the Otsu binarization used in the original method of the synthesis, the reconstruction quality (MSE and SSIM values) is improved by 46% and the diffraction efficiency is increased by 27%.

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Section: Introductionmentioning

confidence: 99%

What Binarization Method Is the Best for Amplitude Inline Fresnel Holograms Synthesized for Divergent Beams Using the Direct Search with Random Trajectory Technique?

et al. 2023

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“…The former includes such subtypes as transmissive liquid crystal, reflective liquid crystal on silicon, and ferroelectric liquid crystal. MEMS-based spatial light modulators are presented by a digital micromirror device (DMD), an active micromirror matrix, and a grating light valve 18 .…”

Section: Introductionmentioning

confidence: 99%

“…Each of the devices is characterized by the type of modulation, among which they can be distinguished: amplitude-only, phase-only, and simultaneous amplitude-phase modulation. Different types of modulators were compared, based on which the advantages and disadvantages of each technique were identified 18 – 21 . The choice of the required device is determined by the peculiarities of the problem to be solved in a particular case.…”

Section: Introductionmentioning

confidence: 99%

Optimization of DMD-based independent amplitude and phase modulation by analysis of target complex wavefront

Georgieva

Белашов

Petrov

2022

Sci Rep

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The paper presents the results of a comprehensive study on the optimization of independent amplitude and phase wavefront manipulation which is implemented using a binary digital micromirror device. The study aims to investigate the spatial resolution and quantization achievable using this approach and its optimization based on the parameters of the target complex wave and the modulation error estimation. Based on a statistical analysis of the data, an algorithm for selecting parameters (carrier frequency of binary pattern and aperture for the first diffraction order filtering) that ensures the optimal quality of the modulated wavefront was developed. The algorithm takes into account the type of modulation, that is, amplitude, phase, or amplitude-phase, the size of the encoded distribution, and its requirements for spatial resolution and quantization. The results of the study will greatly contribute to the improvement of modulated wavefront quality in various applications with different requirements for spatial resolution and quantization.

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“…The former includes such subtypes as transmissive liquid crystal, reflective liquid crystal on silicon, and ferroelectric liquid crystal. MEMS-based spatial light modulators are presented by digital micromirror device (DMD), active micromirror matrix, and grating light valve 18 .…”

Section: Introductionmentioning

confidence: 99%

“…Each of the devices characterized by the type of modulation, among which they are distinguished: purely amplitude, pure-phase, and simultaneous amplitude-phase modulation, and each of modulators has its benefits and disadvantages [18][19][20] . The choice of the required device is determined by the peculiarities of the problem to be solved in a particular case.…”

Section: Introductionmentioning

confidence: 99%

Optimization of DMD-based independent amplitude and phase modulation: a spatial resolution and quantization

Georgieva¹,

Белашов²,

Petrov³

2020

Preprint

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This paper presents the results of a comprehensive study on the optimization of the optical system for independent amplitude and phase wavefront manipulation, which is based on a digital micromirror device implementation. The parameters of generated binary fringe patterns to reach the optimal quality of target complex-valued wavefront have been found for several examples, and a general algorithm for DMD pattern optimization is described. It was shown that a trade-off between spatial resolution and quantization of the target amplitude and phase distribution should be achieved. The increase of carrier frequency results in higher spatial resolution of the modulated complex wave but decreases its quantization. The dependence of the best DMD-pattern generation parameters on the type of target complex wavefront is discussed in terms of spatial resolution and quantization degree.

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Methods and algorithms for computer synthesis of holographic elements to obtain a complex impulse response of optical information processing systems based on modern spatial light modulators

Cited by 12 publications

References 50 publications

What Binarization Method Is the Best for Amplitude Inline Fresnel Holograms Synthesized for Divergent Beams Using the Direct Search with Random Trajectory Technique?

What Binarization Method Is the Best for Amplitude Inline Fresnel Holograms Synthesized for Divergent Beams Using the Direct Search with Random Trajectory Technique?

Optimization of DMD-based independent amplitude and phase modulation by analysis of target complex wavefront

Optimization of DMD-based independent amplitude and phase modulation: a spatial resolution and quantization

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